Miguel Saiz (May 17, 1949 – October 22, 2019) was an Argentine politician latterly of the Radical Civic Union (UCR), who served as governor of Río Negro Province from 2003 until 2011. Born in Montevideo, Uruguay, Saiz studied at the National University of Córdoba and became a lawyer. He became affiliated with the centrist UCR in 1983, and subsequently directed the National Register of Secured Credit, was Vice President of the Forensic Fund of Río Negro, and President of the SanCor co-operative's insurance division. He was elected Councilman in General Roca in 1989, and mayor of the city in 1991; he was re-elected in 1995 and served in the post until 1999. He became a provincial deputy that year and was president of the Río Negro chapter of the UCR-led Alliance (in power nationally between